Staff Software Engineer - Semantic Data Modeling

Staff Software Engineer - Semantic Data Modeling Join to apply for the Staff Software Engineer - Semantic Data Modeling role at WEX Staff Software Engineer - Semantic Data Modeling Join to apply for the Staff Software Engineer - Semantic Data Modeling role at WEX Get AI-powered advice on this job and more exclusive features. This range is provided by WEX. Your actual pay will be based on your skills and experience — talk with your recruiter to learn more. (*) This is a remote position however, the candidate must reside within 30 miles of one of the following locations: San Francisco Bay Area, CA; Portland, ME; Boston, MA; Chicago, IL. About the Role We’re building the semantic backbone of WEX’s Data-as-a-Service (DaaS) platform—an extensible data layer that turns raw data into trusted, reusable, and business-aligned assets. As a Staff Software Engineer on the Semantic Data Modeling team, you will be at the forefront of designing and scaling the data foundation that supports analytics, AI, and operational decisions across all WEX domains. This isn’t a data wrangling or dashboard-building role. It’s a deeply technical, engineering-first position focused on building scalable systems that model complex business entities and relationships through high-performance, semantically meaningful data assets. WEX is re-architecting its data platform to enable domain ownership, semantic clarity, and enterprise-wide reuse. This role is critical to shaping that foundation—empowering teams to build once and use everywhere, from dashboards to machine learning pipelines. If you’re passionate about building systems that scale, and want to design the foundation that defines meaning in data, we’d love to hear from you. What You’ll Do Architect and implement large-scale, semantically rich data objects (e.g., Customer 360, Fleet 360) that serve as the single source of truth across domains. Translate complex business definitions into scalable, interpretable, and trustworthy data entities used across analytics, AI/ML, APIs, and operational workflows. Design for scale, reliability, and performance, handling billions of records and thousands of attributes across sources. Build modular, testable, and versioned transformation pipelines with a strong focus on readability, maintainability, and long-term scalability. Solve for entity resolution, time-aware modeling, and multi-domain relationships using first-principles thinking and clean abstractions. Collaborate with architects, product managers, and domain leads to translate complex business logic into scalable data design patterns. Lead design reviews, code quality standards, and performance benchmarking within the semantic modeling engineering team. Mentor other engineers and raise the bar for engineering excellence across data systems. What You Bring 8+ years of experience in software engineering or data-intensive system design, ideally in environments managing complex, high-volume data ecosystems. A systems thinking mindset—you consider data as a platform, not a pipeline. Strong understanding of data modeling principles, business semantics, and the challenges of modeling real-world entities at scale. Experience building and scaling wide, entity-based tables and modeling domain concepts (e.g., customer, fleet, provider) into durable data objects. Solid understanding of data quality practices—including validation, enrichment, schema enforcement, and business rule encoding. Experience working with large-scale datasets and optimizing transformation pipelines for performance and maintainability. Comfort operating in a collaborative, cross-functional environment, working across product, engineering, and business functions, balancing business logic with platform scalability. A mindset for traceability, reproducibility, and semantic clarity—you build data models others can trust and reuse. Proven experience building and optimizing scalable, distributed systems, including schema design, storage strategy, and lifecycle management. Deep focus on code quality, testing, documentation, and version control as foundational engineering practices. Seniority level Seniority level Mid-Senior level Employment type Employment type Full-time Job function Job function Information Technology Industries Software Development Referrals increase your chances of interviewing at WEX by 2x Inferred from the description for this job 401(k) Vision insurance Medical insurance Get notified when a new job is posted. Sign in to set job alerts for “Software Engineer” roles. 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